Infectious Diseases in Plants

• Tobacco mosaic virus (TMV)


  A very widespread plant infection that affects a number of different plant species including tomatoes
• Tobacco mosaic virus (TMV)


  • Causes the leaves to discolor in a mosaic pattern
  • Reduces the rate of photosynthesis
  • Reduces the growth of the plant
• Rose black spot


  A fungal disease that causes the leaves to develop purple or black spots
• Rose black spot


  • Causes the leaves to turn yellow and fall off
  • Reduces the rate of photosynthesis
  • Reduces the rate of growth
• Treating rose black spot

  1. Spray plants with fungicides

  2. Remove and destroy infected leaves